The High Temperature High Pressure Soft Flow Dyeing Machine is the key factor of high temperature and high pressure dyeing during the operation. It can increase the temperature during operation, and can improve the dyeing rate of the dispersed fuel during use. When operating, the temperature is as high as 130. Above the degree, the percentage of dyeing of most disperse dyes no longer increases significantly. If the temperature is too high, the polyester ester bond will be hydrolyzed, resulting in a decrease in the elasticity and strength of the fiber, and the color shade is poor. Therefore, the high temperature and high pressure dyeing is generally limited to not more than 145 degrees.
The general temperature of the high temperature and high pressure soft flow dyeing machine needs to be controlled between 125 and 130 degrees. At this temperature, the dyeing is not only good in leveling property, but also has a high color yield, and the pH value of the dyeing bath is controlled at 5-6. In the weak acid range, most of the disperse dyes are quite stable, so the color is very bright. In order for the dye to be uniformly adsorbed by the polyester, the heating rate must be strictly controlled. When the temperature is raised to the specified temperature, the dyeing should be kept for a period of time to ensure that the dye diffuses and penetrates sufficiently. The heat preservation dyeing time is generally 30-60 minutes, the light color can be shorter, and the dark color can be longer. After dyeing, the temperature should not be too fast, otherwise it will affect the hand and cause creases.
Application of additives for high temperature and high pressure soft flow dyeing machine
In the high temperature and high pressure dyeing, in order to stably disperse the dye in the dyebath, and in order to obtain the leveling effect, an appropriate amount of dispersant and leveling agent may be added to the dyebath. Slow-flow leveling system: which reduces the tension generated by the fabric during the lifting process, reduces the power of the main pump, and saves power consumption.
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